| 发明名称 |
Pipe system for use on bridges has pattern of ridges and grooves on its internal surface |
| 摘要 |
The pipe system for use on bridges has a rough internal surface. This consists of ridges (1) and grooves (2). The depth of each groove is 5 - 100 micrometers and the distance between ridges is 5 - 200 micrometers.
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| 申请公布号 |
DE19933681(A1) |
申请公布日期 |
2001.01.18 |
| 申请号 |
DE19991033681 |
申请日期 |
1999.07.17 |
| 申请人 |
ILZHOEFER GMBH |
发明人 |
ILZHOEFER, KLAUS |
| 分类号 |
F16L58/02;(IPC1-7):F16L58/02;F16L58/00;F17D1/08;F17D1/16 |
主分类号 |
F16L58/02 |
| 代理机构 |
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代理人 |
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| 主权项 |
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| 地址 |
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